<tr th:each="ls,cpStat : ${grade_list}">
    <td><input type="checkbox"></td>
    <td th:text="${ls.grade_year}"></td>
    <td th:text="${ls.department_name}">Layui</td>
    <td th:text="${ls.grade_name}">Beginner</td>
    <td th:text="${ls.create_time}">2016-11-16 11:50</td>
    <td>
        <a href="javascript:;" th:onclick="teacher([[${ls.id}]])"
           class="layui-btn layui-btn-normal layui-btn-mini">老师</a>
        <a href="javascript:;" th:onclick="edit([[${ls.id}]])" class="layui-btn layui-btn-mini">编辑</a>
        <a href="javascript:;" th:onclick="del([[${ls.id}]])" data-id="1" data-opt="del"
           class="layui-btn layui-btn-danger layui-btn-mini">删除</a>
    </td>
</tr>